Composition of matter for use as fuel



I Patented Au -.14, 192s.

UNITED STATES 1,680,392 PATENT- OFFICE.

noon a. numor smwmonn FALLS, ounnnc, cannon, lissrerronTo cnnnnrnn nnncTno PRODUCTS couranx, LIMITED, or MONTREAL, omens.

comrosrTxon on MATTER non. use as roan.

Application filed larch 30,1925. Serial No. 19,543.

hydrocarbon compounds with very high de composition temperatures resulting from cracking of some of the fuel in the englne, are deposited in the cylinders and eventually bake to an objectionable .scale, whichmust be removed from time to time, as is well known. I

The addition of various substances or compounds to gasolene to overcome this disadvantage have been proposed from time to time but in many cases the proposals are not commercially practical, either because of high cost, or danger, or because the added imbstances separate in time from the gasoone.

It has been discovered that if certain aldehydes, such as acetaldehyde and notably paraldehyde, which will diffuse readily in and make stable solutions with liquid hydrocarbon fuel, are added to gasolene or a similar hydrocarbon fuel the accumulation of carbon in the engine when the fuel is burned is substantially eliminated without anydetrimental efiect to the engine and also with a slight increase of wer/ From tests conducted it would appear that the effect is increased if an unsaturated hydrocarbon s which will remain permanently in solution in the mixture is added.

To illustrate the ractical embodiment of the invention,the following example is cited, but it will be understood that the invention is not confined to the (particular substances or proportions disclose Emmple I such as 300 to 500 hours, is negligible in amount. The proportion of paraldehyde should be varied according to the specific gravity of the gasolene or its tendency todeposit carbon. For ordinary grades of gasolene, 3 to 10% of paraldehyde will suffice, but the amount may be increased with good efiect as regardspower development and without detrimental efiect on the engine.

Example 11 i Paraldehyde havin acetylene gas dissolved therein is mixe with gasolene in approximately the proportions of Example I and the effect obtained is practical elimination of carbon deposition. Preferably the pal-aldehyde is saturated at ordinary temperatures and pressures with acetylene (about 12 volumes of gas to 1 of para-Idehyde, which solution is stable u toabout 130 F.) but the proportion o acetylene may be less.

In preparing mixtures according to this invention, and particularly according to either of the examples, the aldehyde, either with or Without dissolved gas, is added to the hydrocarbon fuel and diffuses almost instantly making a perfectly homogenous mixture or solution from which the aldehyde and gas do not separate under ordinary conditions.

Having thus described my invention, what I claim is y 1. A composition of matter for fuel containing liquid hydrocarbon fuel and an acetic aldehyde having acetylene, gas dissolved therein.

2. A composition of matter for fuel containing liquid hydrocarbon 'fuel and paraldehyle and acetylene gas dissolved in the liqu1 3. A composition of matter for fuel containing gasolene and an acetic aldehyde having acetylene gas dissolved therein.

4. A composition of matter for fuel containing gasolene and paraldehyde ha ing acetylene gas dissolved therein.

5. A composition for admixture with liquid fuel such as gasoline comprising, an acetic aldehyde and acetylene gas dissolved therein.

6. A composition, for admixture with liquid fuel such as gasolene, comprising paraldehyde and acetylene dissolved therein.

7 (A composition, for admixture with liquid fuel such as gasolene, comprising paraldehyde substantially saturated at ordinary temperatures and pressures with acetylene.

8. A method of treating hydrocarbon fuel intended for use in internal combustion engines for the purpose of preventing the deposition of carbon in the engine cylinders, which consists in introducing into said fuel an acetic aldehyde readily soluble therein in a quantity which will make a stable solution and containing in solution acetylene gas in such amount as will remain permanently in solution at ordinary atmospheric temperatures.

9. A composition of matter for fuel containing liquid hydrocarbon fuel, on acetic aldehyde and acetylene gas in stable solution in the liquid at ordinary temperatures and pressures, the amount of gas being greater than would be held under like conditions by the liquid hydrocarbon alone.

10. A composition of matter for fuel containing 98 to 80 parts of a. liquid hydrocarbon fuel, 2 to 20 parts of paraldehyde, and up to 12 volumes of acetylene per volume of paraldehydc.

In witness whereof, I have hereunto set my hand.

HUGH S. REID. 

